Tunable Kondo-Mott physics in bulk Bi2Te2Se topological insulator

被引：15

作者：

Craco, L. ^{[1
]}

Leoni, S. ^{[1
]}

机构：

[1] Tech Univ Dresden, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 19期

关键词：

DIRAC CONE; SURFACE;

D O I：

10.1103/PhysRevB.85.195124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three-dimensional Bi2Te2Se topological insulator (TI) reveals itinerant-localized duality of correlated electrons. Motivated thereby, we investigate the role of local, multiorbital electron interactions in bulk Bi2Te2Se. Within local density approximation plus dynamical mean-field theory (LDA+DMFT), we derive a Kondo-Mott electronic transition with an intermediate Dirac-like phase characterized by linear spectral functions. Mott localization and spin-orbit induced weak antilocalization mark the channel-selective insulating phase. Good semiquantitative agreement with spectroscopy and electrical transport can serve as a theoretical basis for postulating that Mottness is a remarkable way to approach maximally bulk-insulating behavior in real TIs.

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页数：5

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